Tech Desk 
Nov 10, 2024
With the iOS 18.1 update, Apple has rolled out a new security feature called “inactivity reboot” that improves user data protection, making it harder for thieves and law enforcement officials to unlock iPhones, according to a recent report.
iPhone safety with inactivity reboot feature in iOS 18.1
404 Media reported that the “inactivity reboot” feature in the iOS 18.1 update prompts iPhones to reboot automatically following prolonged periods of inactivity, adding an extra layer of security for users.
When the reboot takes place, iPhones enter a more secure “Before First Unlock,” or BFU state, the 404 Media added.
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In the BFU state, the iPhone operates in a highly secure manner where no applications or content are accessible, making it considerably more challenging for anyone, including malicious individuals or law enforcement agencies to access the phone’s data.
The report also mentioned the “After First Unlock” or AFU state. When the user unlocks the device post-reboot, the iPhone shifts into the AFU state, where the data is more readily available for the device to operate normally.
iOS 18.1 automatically switches the device from AFU back to BFU following a period of inactivity, reducing the chance of unauthorised access, especially when the device is lost or stolen.
However, when the device is in an AFU state, law enforcement officials can utilise third-party solutions, such as Cellebrite or GrayKey, to bypass AFU mode restrictions.
